Spring-applied, air-released, slack-adjusting parking brake
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United States of America Patent
Stats
-
Oct 1, 1985
Issued Date -
N/A
app pub date -
Mar 10, 1983
filing date -
Sep 8, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A parking brake, primarily for use with railway vehicles, including a friction clutch associated with a fast-travel nut which is locked by the clutch against rotation on a threaded spindle connected to a brake head, under a force exerted by a plurality of stacked Belleville-type disc springs. The spring load may be overcome by air pressure acting on respective faces of a plurality of serially connected pistons, which, in effect releases the fast-travel nut for free spinning to thereby accommodate axial displacement of the spindle during normal service application and release of the brakes.
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